Running a lot slower on a much faster machine
On my new 27 inch iMac (3,3 GHz Intel Core i5, 24 GB 1867 MHz DDR3, AMD Radeon R9 M395 2048 MB, 2TB Fusion Drive, latest system updates installed) darktable runs noticeably slower than on my previous iMac (with a much slower processor, less RAM, and no OpenCL support). All kinds or operations are affected.
I thought maybe things would improve after the cache for the thumbs had been created, but this is not the case.
#3 Updated by Roman Lebedev about 4 years ago
- % Done changed from 0 to 20
- Status changed from New to Incomplete
Without any profiling data - just with the "feeling" value there won't be any help for you. You need to identify a typical use situation where darktable 2.0 "feels" slower than 1.6.9. Then you need to reproducably measure the timings with '-d perf' (or '-d opencl -d perf') once for 2.0 and then for 1.6.9.
#6 Updated by Rafa G. over 3 years ago
I was reading this issue and I did two perf (one for 1.6.9 and another for 2.0.5).
Steps followed once:
- I removed my .config/darktable path to clean up.
- I loaded darktable 1.6.9 to generated it again.
- I imported one photo
- I loaded darktable with -d perf option
- I loaded the photo in darkroom and zoomed(pointing in an eye)
- Quit darktable
- Save perf logs
Perf logs/output attached to this comment.
#9 Updated by Rafa G. over 3 years ago
I was speaking with Houz via IRC and he recommended me to execute darktable-cli for the logs files.
Not too much difference between version (2.0.5 a little bit faster than 2.0.4)
I attach the new log files for dt-2.0.4 and dt-2.0.5
#10 Updated by Tobias Ellinghaus over 3 years ago
Yes, those are so close that it's hardly important. I guess if you ran the same test using the same version 5 times in a row and averaged you would get almost the same times in both versions. So if there really is a speed difference it should be in GUI code or something else not used in
darktable-cli. Hard to tell without having the problems myself.
#11 Updated by John Morris over 3 years ago
I recently got a new iMac 27" Retina with a 4G GPU
I am also seeing much more lag than I do on my, theoretically slower, linux machine. The worst problem, as far as usability is concerned, is lag in lighttable between mouse movement and mouse-over highlighting of the thumbnails. The lag can be a little more than 1 second, which makes rating and tagging images quite frustrating. I find the linux version laggy enough (maybe as much as .5 seconds in lighttable) so I really think a general speedup in mouse-over response is needed, in the order of at least 2-3 times faster.
#12 Updated by John Morris over 3 years ago
I should add that there is also lag responding to keyboard navigation in lighttable on my iMac. Again, the lag is also there to a lesser extent on my linux machine.
Another problem is the case where I where I press an arrow key 2 times, thumbnail highlight will move 2 places but pressing 3 times only results in moving 2 places. The third keypress seems to be queued up and not acted upon till another key press. This problem is common to Linux and Mac OSX.